The surface modification of silicon nitride powder is mainly achieved through physical and chemical methods to improve the physical and chemical properties of silicon nitride particles.
The surface modification of silicon nitride powder is mainly achieved through physical and chemical methods to improve the physical and chemical properties of silicon nitride particles.
Copper is different from metals such as aluminum and nickel in that it is difficult to form a dense and stable intrinsic passivation layer on its surface. Therefore, the exposed copper surface will be continuously oxidized and corroded by oxygen and water vapor in the air. The smaller the particle size and larger the specific surface area of copper powder, the easier it is to rapidly oxidize to produce products such as cuprous oxide (Cu2O) and copper oxide (CuO). This oxide insulation layer significantly reduces the conductivity of copper powder and hinders particle sintering connection, resulting in degradation of the performance of the conductive paste.
Copper nanoparticles have attracted a lot of interest in recent years due to their interesting properties, low-cost preparation, and many potential applications in catalysis, cooling fluids, or conductive inks. In this study, copper nanoparticles were synthesized by chemical reduction of copper sulfate CuSO4 and sodium borohydride NaBH ₄ in water without inert gas protection.
Graphene coated copper and silver coated copper have essential differences in conductivity, each with its own advantages and disadvantages, and their applicable scenarios are also different.
How to prepare the ferric oxide powder Fe3O4 nanopowder? Let's briefly introduce the manufacturing process, and you can also follow this method to make it.
